The 25-year-old singer is set to tie the knot with British comedian Russell Brand, 35, later this year. The details of their nuptials are top-secret, but Perry insists the organizing part is driving her crazy.

"I am up to my eyeballs in planning everything right now. Most people have breakdowns planning their wedding. I'm having a breakdown right now," Stuff.co.nz quoted Katy as telling Australian radio hosts Kyle and Jackie O.